Container forming apparatus, container forming method, container, and instant food packaging method using container

A container forming apparatus for forming a container by thermoforming, comprising:

• a first mold part which includes a bottom forming part for forming a bottom portion of the container and a side forming part for extending to be inclined upward from the bottom forming part and forming a part of a side portion of the container and is lifted upward to separate and take out the container in which the forming is completed to press the container;
• a second mold part which is disposed outside the first mold part and forms the remaining portion except for the part of the side portion,
• wherein the second mold part is provided to be spaced apart at a predetermined interval from the first mold part to form a stepped portion protruding stepwise from the side portion,
• wherein the side portion of the container includes a first side surface which extends to be inclined upward from the bottom portion and has a first slope with respect to the bottom surface of the bottom portion, and a second side surface which extends to be inclined upward from the first side surface and has a second slope with respect to the bottom surface,
• wherein the side forming part of the first mold part is formed to be inclined at the first slope, and the second mold part comprises:
• a first inclined surface which is inclined at the first slope with respect to a reference surface of the bottom forming part at the same angle as the bottom surface and forms the first side surface together with the side forming part,
• wherein the first side surface includes a first region which is a region that continues from the bottom part and a second region located above the first region,
• wherein the side forming part of the first mold part forms the first region, and the first inclined surface of the second mold part forms the second region, and
• wherein the stepped portion is located between the first region and the second region and protrudes stepwise along a circumferential direction of the first side surface.